Requirements for use of water-based defoamers
In the current industrial production field, water-based defoamers are the most outstanding products in industrial production. They can effectively play a defoaming role during the application process. However, with the continuous development of industry, more and more types of water-based defoamer products are used. However, different water-based defoamer products have different effects. So, do you know the requirements for the use of water-based defoamer products? Let’s see how it is introduced.
First, consider whether the system of water-based paint defoamer is suitable for your industry. Because defoamers are divided into oily and water-based, different defoamers are used in different industries. Secondly, consider the amount of alcohol or organic solvent in the system. Because it is a consensus that alcohol has a defoaming effect, sometimes there will be some interference. Applicable PH range of water-based paint defoamer products. Strong acid and strong alkali environments have more stringent requirements for defoamers, which requires the defoamer manufacturer to explain the carrier environment.
Consider the long-term effectiveness of water-based defoamers. Some water-based defoamers start well, but the effect is much worse after being placed for a period of time. There are many influencing factors, at least two reasons:
1) The defoamer is expanded by the surfactant.
2) The main agent of the water-based defoamer can be absorbed by the colloidal resin.
Defoaming ability in static conditions. When the liquid that generates bubbles flows back into the storage tank or directly into the packaging barrel, it is okay if the defoaming is fast.
2. Defoaming ability in dynamic conditions:
1) Dynamic defoaming effect in a relatively closed small space. Because it involves gas entering the bubbles, the external air pressure is reduced in a short time, which is more conducive to the generation and stability of bubbles. Wetting agents and emulsifiers have a shrinking effect on the gas in the bubbles. One is nothing, but tens of millions are considerable.
2) Open dynamic defoaming effect, which is not available when a single flexographic printing machine is converted into a coating machine. The narrow space of the gluing roller and the inking roller is open and flipped at high speed, and the bubble generation speed is quite fast.
